WO2025152242A1 - 干法极片膜片的制备方法和制备设备 - Google Patents

干法极片膜片的制备方法和制备设备

Info

Publication number
WO2025152242A1
WO2025152242A1 PCT/CN2024/079648 CN2024079648W WO2025152242A1 WO 2025152242 A1 WO2025152242 A1 WO 2025152242A1 CN 2024079648 W CN2024079648 W CN 2024079648W WO 2025152242 A1 WO2025152242 A1 WO 2025152242A1
Authority
WO
WIPO (PCT)
Prior art keywords
rollers
roller
film
membrane
pair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/079648
Other languages
English (en)
French (fr)
Inventor
贾强
赵瑞瑞
任仁
李建平
周思秋月
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eve Energy Co Ltd
Original Assignee
Eve Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eve Energy Co Ltd filed Critical Eve Energy Co Ltd
Priority to EP24205891.5A priority Critical patent/EP4586331A1/en
Publication of WO2025152242A1 publication Critical patent/WO2025152242A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/18—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using profiled rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/143—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis
    • B26D1/15—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis with vertical cutting member
    • B26D1/151—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis with vertical cutting member for thin material, e.g. for sheets, strips or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • H01M4/0435—Rolling or calendering
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of electrode plate technology, and in particular to a method and equipment for preparing a dry-process electrode plate membrane.
  • the present application aims to solve the following technical problem: in the existing membrane prepared by dry process technology, the membrane strength is insufficient due to improper matching of pressure roller size and pressure.
  • At least one pair of third rollers with a roller diameter of d3 is provided, and d3>d1, the pressure of the third rollers is set to t3, and t3>t1, and the secondary membrane is thinned twice by the third rollers to obtain a target membrane with a target thickness.
  • the present application provides a dry-process electrode membrane preparation device, comprising:
  • a pair of first rollers arranged downstream of the material feeding structure, for rolling the fiberized powder to obtain an initial film sheet with an initial thickness, wherein the diameter of the first rollers is d1, and the pressure of the first rollers is t1;
  • a pair of second rollers disposed downstream of the pair of first rollers, for performing primary thinning on the primary film to obtain a secondary film of secondary thickness, wherein the diameter of the second rollers is d2, and the pressure of the second rollers is t2;
  • At least one pair of third rollers is disposed downstream of the pair of second rollers, and is used to perform secondary thinning on the secondary film to obtain a target film of target thickness.
  • the diameter of the third rollers is d3, and the pressure of the second rollers is t3.
  • the roller diameters and pressures of the first roller for pressing the powder into a film and the second and third rollers for adjusting the thickness and compaction of the film once and twice to d3>d1>d2 and t3>t1>t2 when the powder is pressed into a film and adjusted, the powder can first be pressed into an initial film by the first roller with a larger roller diameter and pressure, and then the initial film can be quickly roughly adjusted at a faster walking speed by the second roller with a smaller roller diameter and pressure, so that the thickness and compaction of the film can be preliminarily adjusted, and finally the third roller with the maximum roller diameter and maximum pressure can be finely adjusted with a large pressure to make the obtained film meet the required thickness and have a higher compaction degree.
  • the film has higher strength and more suitable mechanical properties such as toughness, and at the same time, the film has an excellent pore structure to improve the battery electrical performance when the film is used in a battery, and at the same time has a lower tortuosity.
  • FIG1 is a schematic flow chart of a method for preparing a dry electrode membrane according to an embodiment of the present application
  • FIG2 is a schematic diagram showing a comparison of the tensile strength of a diaphragm prepared in an embodiment of the present application and a diaphragm prepared by a conventional process;
  • FIG3 is a schematic diagram of the structure of a dry-process electrode membrane preparation device according to an embodiment of the present application.
  • FIG. 1 is a method 100 for preparing a dry electrode membrane provided in an embodiment of the present application, comprising the following steps:
  • the fiberized powder in this embodiment includes but is not limited to active materials, conductive agents and binders, and the fiberized powder is formed by applying shear force to the active materials, conductive agents and binders.
  • the active material can be a positive electrode material such as lithium iron phosphate, lithium nickel cobalt manganese oxide, lithium cobalt oxide, or one or more combinations of graphite and/or silicon oxygen/silicon carbon negative electrode materials;
  • the conductive agent includes but is not limited to one or more combinations of conductive carbon black, carbon nanotubes, graphene, etc.;
  • the binder includes but is not limited to one or more combinations of polytetrafluoroethylene, tetrafluoroethylene, polyacrylic acid, carboxymethyl cellulose, polyethylene glycol, polyvinyl pyrrolidone, etc.
  • the powder After shearing force is applied to the active material, the conductive agent and the binder to obtain fiberized powder, the powder is discharged through the discharge structure 10 .
  • the material discharge structure 10 of this embodiment includes a vibrating screen 11 and a movable material trough 12 arranged below the vibrating screen 11.
  • the vibrating screen 11 includes two layers of screens arranged from top to bottom, and the fiberized powder falls downward from the screen holes of the screen.
  • the aperture range of the screen is set to 0.5-5mm to match the feeding of fibrous powders with different composition ratios, so as to adapt to the parameters of various components in the subsequent calendering step, for example, it can be set to 0.5mm, 0.6mm, 0.7mm, 1.0mm, 3.0mm...5.0mm.
  • the vibration frequency of the vibrating screen 11 is 0-100HZ.
  • the vibration rate of the vibrating drying net is set to 0, the powder can fall out by its own gravity, or when the vibrating screen 11 vibrates, it is vibrated out by the vibration of the vibrating screen 11.
  • the vibration frequency of the vibrating screen 11 is set to 0HZ, 6HZ, 10HZ, 20HZ, 50HZ, 80HZ...100HZ.
  • the fibrous powder is rolled by a pair of first rollers 20 to obtain an initial film sheet 300 of initial thickness.
  • the powder When the powder is pressed into the initial film sheet 300, the powder gradually falls from the gap between the two first rollers 20 to be pressed into a film by the first rollers 20.
  • the surface of each first roller 20 is plated with a metal chromium layer, and each is connected to a driving mechanism so that it can be driven to rotate by its own driving mechanism so that each has a different rotation speed.
  • first roller 20 and the second roller 40 in this embodiment are connected to their own heating mechanisms so that the first roller 20 and the second roller 40 can be heated to different temperatures so that the film has different extension surfaces.
  • 10 cm ⁇ d1 ⁇ 30 cm; 0.8 ton ⁇ t1 ⁇ 8 ton, that is, a smaller roller diameter and a smaller pressure are used to initially press the fiber powder into a film.
  • the rotation speed of the first roller 20 in this embodiment is V1.
  • the rotation speed range of V1 is 0 ⁇ V1 ⁇ 1800rpm, and the temperature range is 50°C ⁇ T1 ⁇ 200°C.
  • the above roller diameter and pressure are matched to enable the powder to initially form a film, and a smaller pressure is used to ensure the flexibility of the initial film sheet 300 obtained, and reduce the degree of damage to the film sheet during the subsequent thinning adjustment process.
  • the temperature of the first roller 20 is adjusted according to the different components in the actual fiberized powder.
  • the temperature of the first roller 20 is not too low, so that the powder cannot be heated, resulting in the powder being unable to form a film at a faster speed, and it cannot be too high, resulting in the surface temperature of the first roller being too high, resulting in a lower hardness, which is not convenient for film formation, and at the same time, the high temperature causes damage to the powder.
  • the initial thickness of the initial film 300 is controlled to be in the range of 0.2 mm-1.0 mm, so that the initial film 300 has a certain thickness and can be used for subsequent thinning treatment.
  • the initial film sheet 300 is cut in this step.
  • the cutting structure 30 in this embodiment includes a support roller 31, a trimming knife 32, a powder suction nozzle 33 and a dust removal box 34.
  • the support roller 31 is used to support the initial film sheet 300
  • the trimming knife 32 is used to cut the edge of the initial film sheet 300 so that the edge of the film sheet can have a certain flatness
  • the powder suction nozzle 33 is used to suck away the debris and dust generated during the cutting process of the trimming knife 32
  • the dust removal box 34 is used to collect the debris and dust adsorbed by the powder suction nozzle 33.
  • the flatness of the initial film sheet 300 is adjusted by the trimming knife 32, and at the same time, the powder and debris are prevented from flying into the environment through the adsorption of the powder suction nozzle 33 and the collection of the dust removal box 34.
  • the cutting structure 30 in this embodiment includes two trimming knives 32 arranged opposite to each other, and one trimming knife 32 is used to cut the edge of the primary film 300.
  • the distance between each trimming knife 32 and the center of the primary film 300 can be adjusted, and the travel speed of the trimming knife 32 is adapted to the travel speed of the primary film 300.
  • the roller diameter d2 of the second roller 40 in this embodiment is in the range of 5cm ⁇ d2 ⁇ 20cm, and the pressure t2 is in the range of 0.5 tons ⁇ t2 ⁇ 7 tons, both of which are smaller than the roller diameter and pressure of the first sub-roller 10.
  • the smaller roller diameter and pressure enable the second roller 20 to have a faster walking speed, so as to achieve rapid adjustment of the compaction degree of the initial membrane sheet 300.
  • the component force of the second roller 40 in the direction perpendicular to the membrane sheet is small, so that the initial membrane sheet 300 is initially extended to prepare for secondary thinning.
  • the rotation speed of the second roller 40 in this embodiment is V2, and V2>V1 is set so that the roller can have a larger linear speed during the thinning process, thereby improving the forming efficiency of the membrane. Specifically, 500rpm ⁇ V2 ⁇ 2000rpm.
  • the temperature of the second roller 40 is T2, T1 ⁇ T2. Specifically, 50°C ⁇ T2 ⁇ 200°C.
  • the temperatures of the first roller 20 and the second roller 40 are adjusted according to the different components in the actual fiberized powder or the same components but different proportions. Through this temperature control, the temperature of the second roller 40 is not too low, and the diaphragm cannot be heated, which causes the diaphragm to have a large friction force and is easy to extend; at the same time, the temperature of the second roller 40 is not too high, and when it contacts the surface of the diaphragm, it causes damage to the diaphragm.
  • the two second rollers 40 of the present embodiment are respectively connected to a driving mechanism so that they can be driven to rotate through their respective driving mechanisms so that they each have a different rotational speed, so that the two second rollers 40 can have a speed difference, thereby causing a traction force to be generated on the diaphragm by the speed difference to drive the secondary diaphragm to move forward; at the same time, the second rollers 40 of the present embodiment are connected to their respective heating mechanisms so that the two second rollers 40 can be heated to different temperatures. In this way, there can be a temperature difference when the two second rollers 40 are heated by the heating mechanism, so as to achieve different ductility on both sides of the diaphragm.
  • the thickness and compaction of the initial film 300 are initially adjusted by the second roller 40, specifically, a rough adjustment with a faster travel speed;
  • the thickness of the secondary membrane is controlled to range from 0.1mm to 0.3mm, so that the secondary membrane has a certain thickness, preparing for the subsequent membrane adjustment structure to achieve the target membrane 500 of the target thickness.
  • Step S5 providing at least one pair of third rollers 50 with a roller diameter of d3, and d3>d1, setting the pressure of the third rollers 50 to t3, and t3>t1, and performing secondary thinning on the secondary film by the third rollers 50 to obtain a target film 500 with a target thickness.
  • this step is to make a fine adjustment to the membrane.
  • the roller diameter d3 of the third roller 50 in this embodiment is set to d3>d1>d2, and the pressure t3 of the third roller 50 is set to t3>t1>t2, that is, after the powder is formed into a film and initially thinned, the roller with the largest roller diameter and the roller with the maximum pressure are used in the final thinning step to achieve fine adjustment of the thickness and compaction of the membrane.
  • this embodiment uses the largest roller diameter and the largest pressure to make a secondary adjustment to the thickness and compaction of the secondary diaphragm, so as to obtain the final diaphragm with the desired target thickness and compaction.
  • the speed is set to be similar to the second roller 40, so as to match the travel speed of the second pressure roller 40 to adapt to the travel speed of the diaphragm conveyed by the second roller 40.
  • the roller diameter d3 of the third roller 50 is set in a large range: 15mm ⁇ d3 ⁇ 60mm, and the pressure range is: 1 ton ⁇ t3 ⁇ 10 tons, so that the roller diameter of the third roller 50 can have a larger roller diameter and pressure relative to the first roller 20 and the second roller 40, so as to achieve the effect of adjusting the membrane thickness and compaction degree to the target parameters.
  • the speed V3 range of the third roller 50 in this embodiment is set to: V2 ⁇ V3>V1, specifically, 500rpm ⁇ V3 ⁇ 2000rpm; the temperature of the third roller 50 in this embodiment is set to the minimum, T1 ⁇ T2>T3, specifically, 0°C ⁇ T3 ⁇ 150°C, so that the third roller 50 can have a smaller speed and temperature and perform fine adjustment on the diaphragm.
  • a second scraper 51 is also provided, and a downward pressure is applied to the membrane adhered to the surface of the third roller 50 by the second scraper 51 to separate the membrane from the surface of the third roller 50 .
  • the thickness of the final membrane obtained in this embodiment ranges from 0.06 mm to 0.2 mm.
  • the roller diameter d1 of the first roller 20 in the present embodiment can be set to values such as 10cm, 12cm, 15cm, 17cm, 20cm, 30cm, etc.; the roller diameter d2 of the second roller 40 can be set to values such as 5cm, 6cm, 7cm, 10cm, 15cm, 20cm, etc., and the roller diameter d3 of the third roller 50 can be set to values such as 15cm, 30cm, 45cm, 50cm, 55cm, 60cm, etc.; the pressure t1 of the first roller 20 can be set to values such as 0.8 tons, 1 ton, 2 tons, 3 tons, 5 tons, 8 tons, etc.; the pressure t2 of the second roller 40 can be set to values such as 0.5 ton, 1 ton, 2 tons, 4 tons, 6 tons, 7 tons, etc.; the pressure t3 of the third roller 50 can be set to values such as 1 ton, 2 tons, 4 tons, 6 tons, 8
  • the preparation method of the dry electrode membrane of this embodiment also includes a winding step, in which the final membrane is wound up by a winding structure for use in preparing the electrode in the next step.
  • FIG. 2 The test data of the diaphragm obtained according to the preparation method of the dry electrode diaphragm in this embodiment is shown in Figure 2, wherein curve a is a schematic diagram of the tensile strength of the diaphragm prepared by the conventional process on the existing market, curve b is a schematic diagram of the tensile strength of the initial diaphragm obtained by using the first rolling roller 20, curve c is a schematic diagram of the tensile strength of the secondary diaphragm obtained after the initial thinning of the initial diaphragm by the second rolling roller 40, and curve d is a schematic diagram of the tensile strength of the target diaphragm obtained after the secondary diaphragm is thinned for the second time by the third rolling roller 50.
  • curve a is a schematic diagram of the tensile strength of the diaphragm prepared by the conventional process on the existing market
  • curve b is a schematic diagram of the tensile strength of the initial diaphragm obtained
  • the initial film obtained by the first rolling roller 20 has a tensile strength of 1.15 MPa and a breaking elongation of 9.86%, indicating that the initial film prepared by the first rolling roller 20 has better toughness than the ordinary process.
  • the secondary film obtained by the second roller 40, after thinning the primary film was tested to have a tensile strength of 1.39 MPa and a breaking elongation of 8.59%. It can be concluded that the strength and toughness of the secondary film obtained by the second roller 40 after thinning is better than that of the primary film obtained by the ordinary process and the first roller 20, indicating that the parameter control of the thinning roller can effectively improve the performance of the film.
  • the present application further provides a dry electrode membrane preparation device 200 , which includes a pair of first rollers 20 , a pair of second rollers 40 and at least a pair of third rollers 50 .
  • a pair of first rollers 20 are used to roll the fiberized powder to obtain an initial film sheet 300 of initial thickness, the diameter of the first roller is d1, and the pressure of the first roller 20 is t1;
  • a pair of second rollers 40 are arranged downstream of the pair of first rollers 20, and are used to thin the initial film sheet 300 to obtain a secondary film sheet of secondary thickness, the diameter of the second roller is d2, and the pressure of the second roller 40 is t2;
  • at least one pair of third rollers 50 are arranged downstream of the second roller 40, and are used to perform secondary thinning on the secondary film sheet to obtain a final film sheet of final thickness, the diameter of the third roller 50 is d3, and the pressure of the second roller 40 is t3, wherein d3>d1>d2, t3>t1>t2.
  • the above-mentioned dry electrode membrane preparation equipment 200 sets the roller diameter and pressure of the first roller 20 for pressing the powder into a membrane and the second roller 40 and the third roller 50 for adjusting the membrane thickness and compaction once and twice to d3>d1>d2, t3>t1>t2, so that when pressing the powder into a membrane and adjusting it, the powder can be first pressed into an initial membrane by the first roller 20 with a larger roller diameter and pressure, and then the initial membrane 300 can be quickly roughly adjusted at a faster walking speed by the second roller 40 with a smaller roller diameter and pressure, so that the thickness and compaction of the membrane are preliminarily adjusted, and finally the membrane is finely adjusted with a large pressure by the third roller 50 with the maximum roller diameter and maximum pressure, so that the obtained membrane can meet the required thickness and have a higher compaction, and at the same time, the membrane has higher mechanical properties such as higher strength and higher toughness, and at the same time, the membrane has an excellent pore structure to improve the battery electrical performance when the membrane is applied to
  • the preparation equipment of this embodiment also includes a feeding structure 10 for feeding material to a pair of first rollers 20, the feeding structure 10 includes a vibrating screen 11 and a movable material trough 12 arranged below the vibrating screen 11, the vibrating screen 11 includes two layers of screens separated from top to bottom, and the movable material trough 12 is used to receive the powder dropped from the vibrating screen 11 for feeding out, so that after the powder is poured on the vibrating screen 11, the vibrating screen 11 vibrates to allow the powder to gradually pass through the two layers of screens and fall onto the movable material trough 12, and the movable material trough 12 can be gradually adjusted from a vertical state to a horizontal state to drive the powder to move, so as to gradually sprinkle the powder, and at the same time adjust the speed at which the powder is sprinkled to avoid accumulation or agglomeration of the powder.
  • the feeding structure 10 includes a vibrating screen 11 and a movable material trough 12 arranged below the vibrating screen 11, the vibrating screen 11 includes two layers of screens separated
  • the present embodiment further includes a second guide roller 60 to reverse the direction of the primary film 300 and guide it to the second roller 40 .
  • the vibrating screen 11 used in this embodiment can realize the granulation of fiberized powder, and at the same time, powders of different particle sizes can be obtained through screens with different apertures, different film-forming efficiencies can be controlled, and the effect of preventing the fiberized powder from agglomerating can be achieved to ensure the uniformity and continuity of material feeding.
  • the preparation equipment of the dry-process electrode diaphragm also includes a cutting structure 30, which is used to cut the edge of the initial diaphragm 300, including a support roller 31, a trimming knife 32, a powder suction nozzle 33 and a dust removal box 34.
  • the support roller 31 is used to support the initial diaphragm 300
  • the trimming knife 32 is used to cut the edge of the initial diaphragm 300
  • the powder suction nozzle 33 is used to suck away the debris and dust generated during the cutting process of the trimming knife 32
  • the dust removal box 34 is used to collect the debris and dust adsorbed by the powder suction nozzle 33.
  • the trimming knife 32 can adjust the flatness of the initial diaphragm 300 in this step, and at the same time, the adsorption of the powder suction nozzle 33 and the collection of the dust removal box 34 can prevent powder and debris from flying into the environment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

干法极片膜片的制备方法和制备设备，干法极片膜片的制备方法包括：提供一对辊径为d1的第一轧辊（20），设定第一轧辊（20）的压力为t1，通过一对第一轧辊（20）对纤维化粉料进行辊压，以得到初厚度的初膜片（300）；提供一对辊径为d2的第二轧辊（40），且d2＜d1，设定第二轧辊（40）的压力为t2，且t2＜t1，通过一对第二轧辊（40）对初膜片（300）进行初次减薄，以得到次厚度的次膜片（400）；提供一对辊径为d3的第三轧辊（50），且d3＞d1，设定第三轧辊（50）的压力为t3，且t3＞t1，通过第三轧辊（50）对次膜片（400）进行二次减薄，以得到目标厚度的目标膜片（500）。

Description

干法极片膜片的制备方法和制备设备
本申请要求在2024 年 01 月 15 日提交中国专利局、申请号为2024100581145的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电极极片技术领域，尤其涉及一种干法极片膜片的制备方法和制备设备。
 背景技术
锂离子电池的制备工艺中，近年来，一种区别于湿法电池制造的干法技术被得到大力应用，干法电极技术由于不使用或使用少量溶剂，相比湿法工艺节约了大量能耗和溶剂回收费用，同时节省了几十米的烘烤通道，降低了投资成本，因此具有成本优势。
干法电极的制备过程中，将活性材料、导电剂、粘结剂在特定温度下施加剪切力进行纤维化得到纤维化粉料，并对粉料进行压延成膜后收卷。现有的通过干法技术制备的膜片中，由于压辊尺寸和压力匹配不当，存在膜片强度不足的情况。 技术问题
本申请旨在解决以下技术问题：现有的通过干法技术制备的膜片中，由于压辊尺寸和压力匹配不当，存在膜片强度不足的情况。
 技术解决方案
第一方面，本申请提供了一种干法极片膜片的制备方法，包括：
提供一对辊径为d1的第一轧辊，设定所述第一轧辊的压力为t1，通过一对第一轧辊对纤维化粉料进行辊压，以得到初厚度的初膜片；
提供一对辊径为d2第二轧辊，且d2＜d1，设定所述第二轧辊的压力为t2，且t2＜t1，通过一对第二轧辊对所述初膜片进行初次减薄，以得到次厚度的次膜片；
至少提供一对辊径为d3第三轧辊，且d3＞d1，设定所述第三轧辊的压力为t3，且t3＞t1，通过所述第三轧辊对所述次膜片进行二次减薄，以得到目标厚度的目标膜片。
第二方面，本申请提供了一种干法极片膜片的制备设备，包括：
一对第一轧辊，设于所述下料结构的下游，用于对纤维化粉料进行辊压，以得到初厚度的初膜片，所述第一压辊的直径为d1，所述第一轧辊的压力为t1；
一对第二轧辊，设于一对所述第一轧辊的下游，用于对所述初膜片进行初次减薄，以得到次厚度的次膜片, 所述第二压辊的直径为d2，所述第二轧辊的压力为t2；
至少一对第三轧辊，设于一对所述第二轧辊的下游，用于对所述次膜片进行二次减薄，以得到目标厚度的目标膜片，所述第三压辊的直径为d3，所述第二轧辊的压力为t3，
其中，d3＞d1＞d2，t3＞t1＞t2。
 有益效果
通过将粉料压合成膜的第一轧辊以及对膜片厚度和压实度进行一次、二次调整的第二轧辊和第三轧辊的辊径和压力设置为d3＞d1＞d2，t3＞t1＞t2的方式，以在对粉料进行压制成膜和调整时，能够首先通过较大辊径和压力的第一轧辊对粉料进行压制初成膜，再通过较小辊径和压力的第二轧辊以较快的行走速度对初膜片进行快速的粗调，使得膜片的厚度和压实度进行得到初步调整，最后通过最大辊径和最大压力的第三轧辊对膜片进行大压力的精细调整，以使得到的膜片能够符合所需的厚度，具有更高的压实度，同时使膜片具有更高的强度和更适宜的韧性等机械性能，同时使膜片具有优异的孔道结构，以提升膜片应用于电池时的电池电性能，同时具有更低的曲折度。
 附图说明
图1为本申请实施例的干法极片膜片的制备方法的流程示意图；
图2为本申请实施例的所制备膜片和常规工艺制备的膜片的拉伸强度对比示意图；
图3为本申请实施例的干法极片膜片的制备设备的结构示意图。
附图：200-干法极片膜片的制备设备，10-下料结构，11-震动筛网，12-活动料槽，20-第一轧辊，30-切割结构，31-支撑辊，32-切边刀，33-吸粉嘴，34-除尘盒，40-第二轧辊，41-第一刮刀，42-第一导辊，50-第三轧辊，51-第二刮刀，60-第二导辊，70-收卷结构，300-初膜片；400-次膜片，500-目标膜片。
 本发明的实施方式
在本申请的描述中，需要说明的是，术语“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
下面结合附图对本申请作进一步详细的说明。
请参阅图1，为本申请实施例提供的干法极片膜片的制备方法100，包括以下步骤：
S1，通过下料结构10对纤维化粉料进行下料。
其中，本实施例中的纤维化粉料包括但不限于由活性材料、导电剂和粘结剂，通过向活性材料、导电剂和粘结剂施加剪切力后形成纤维化粉料。活性材料可以为磷酸锂铁、镍钴锰酸锂、钴酸锂等正极材料，或为石墨和/或硅氧/硅碳负极材料中的一种或多种组合；导电剂包括不限于导电炭黑、碳纳米管、石墨烯等中的一种或多种组合；粘结剂包括不限于聚四氟乙烯、四氟乙烯、聚丙烯酸、羧甲基纤维素、聚乙二醇、聚乙烯基吡咯烷酮等中的一种或多种的组合。
将活性材料、导电剂以及粘结剂施加剪切力得到纤维化粉料后，通过下料结构10进行下料。
具体地，本实施例的下料结构10包括震动筛网11和设于震动筛网11下方的活动料槽12，震动筛网11包括两层从上往下设置的筛网，纤维化粉料从筛网的筛孔中向下掉出。
具体地，本实施例中设置筛网的孔径范围为0.5-5mm，以匹配不同成分配比的纤维化粉体的下料，以和后续的压延步骤中的各个部件的参数相适配，例如可以设置为0.5mm、0.6mm、0.7mm、1.0mm、3.0mm……5.0mm。震动筛网11的震动频率为0-100HZ，当震动晒网的震动速率设置为0时，粉料能够依靠自身重力掉落出，或者当震动筛网11发生震动时，由震动筛网11的震动而震出。具体地，震动筛网11的震动频率设置为0HZ、6HZ、10HZ、20HZ、50HZ、80HZ……100HZ 。
S2，提供一对辊径为d1的第一轧辊20，设定第一轧辊20的压力为t1，通过一对第一轧辊20对纤维化粉料进行辊压，以得到初厚度的初膜片300。
通过下料结构10进行下料后，本步骤中通过一对第一轧辊20对纤维化粉料进行辊压，得到初厚度的初膜片300，在将粉料压制成初膜片300时，粉料从两个第一轧辊20之间的间隙逐渐掉落，以由第一轧辊20压制成膜。其中，本实施例中的每一个第一轧辊20的表面镀有金属铬层，并且各自连接驱动机构，以能够通过各自的驱动机构驱动转动，以使各自具有不同的转速，如此，在两个第一轧辊20之间形成速度差，能够对得到初膜片300的往前运动产生一个牵引力；同时本实施例中的第一轧辊20和第二轧辊40连接各自的加热机构，以使第一轧辊20和第二轧辊40能够被加热到不同的温度，以使膜片具有不同的延展面。
具体地，本实施例中的10cm≤d1≤30cm；0.8吨≤t1≤8吨，即采用较小的辊径和较小的压力以将纤维粉料初次压成膜片。
进一步地，本实施例中的第一轧辊20的转速为V1,具体地，V1的转速范围为0＜V1≤1800rpm，温度范围分别为50℃≤T1≤200℃，配合上述的辊径大小和压力大小以使粉料能够初步成膜，且采用较小的压力，以保证得到的初膜片300的柔韧性，降低后续减薄调整过程中对膜片的破坏程度。同时第一轧辊20的温度由实际中的纤维化粉料中的成分不同进行调整。通过该温度控制，使得第一轧辊20的温度不过于太低，而无法对粉料进行加热，导致粉料不能较快速度的成膜，也不能太高，而导致第一压辊的表面温度过高而导致硬度较低，不便于成膜，同时温度过高对粉料造成损伤。
具体地，本实施例中的第一轧辊20的温度优先佳范围为30℃-100℃。在实际生产中，可以根据不同的粉料的成分调整第一轧辊20的设定温度。
其中，在本步骤中得到初膜片300后，控制得到初膜片300的初厚度的范围为0.2mm -1.0mm，以使初膜片300具有一定的厚度，能够用于后续的减薄处理。
S3，切割结构30对初膜片300的边缘进行切割，以得到边缘平整的膜片。
初步得到初膜片300后，本步骤中将对初膜片300进行切割处理。
具体地，本实施例中的切割结构30包括支撑辊31、切边刀32、吸粉嘴33和除尘盒34，支撑辊31用于对初膜片300进行支撑，切边刀32用于对初膜片300的边缘进行切割，以使膜片的边缘能够具有一定的平整度，吸粉嘴33用于吸走切边刀32切割过程中产生的碎屑和粉尘，除尘盒34用于收集吸粉嘴33吸附而来的碎屑和粉尘，如此，本步骤中通过切边刀32对初膜片300的平整度进行调整，同时通过吸粉嘴33的吸附和除尘盒34的收集，避免粉体和碎屑飞落在环境中。
可以理解地，由于初膜片300具有延长长度，也具有宽度，沿宽度方向具有两个侧边，因此，本实施例中的切割结构30包括两个相对设置的切边刀32，一个切边刀32对应用于对初膜片300的边缘进行切割。同时，为了调整切割宽度，每一个切边刀32和初膜片300的中心之间的距离可以调节，且切边刀32的行走速度适配于初膜片300的行走速度。
S4，提供一对辊径为d2第二轧辊40，且d2＜d1，设定第二轧辊40的压力为t2，且t2＜t1，通过一对第二轧辊40对初膜片300进行初次减薄，以得到次厚度的次膜片。
完成上述步骤的切割之后，本步骤中将对初膜片300的厚度进行调整，以得到次厚度的次膜片。
具体地，本实施例中的第二轧辊40的辊径d2的范围为5cm≤d2≤20cm，压力t2的范围为0.5吨≤t2≤7吨，均小于第一亚棍10的辊径和压力，如此，较小的辊径和压力，使得第二轧辊20能够具有更快的行走速度，，以实现对初膜片300的压实度的快速调整，同时第二压辊40在垂直于膜片的方向上的分力较小，使初膜片300得到初步延展，为二次减薄做准备。
进一步地，本实施例中的第二轧辊40的转速为V2，且设置V2＞V1，以使减薄过程中的轧辊能够具有较大的线速度，从而提升膜片的成型效率。具体地，500rpm≤V2≤2000rpm。
其中，第二轧辊40的温度为T2，T1≥T2。具体地，50℃≤T2≤200℃。第一轧辊20和第二轧辊40的温度根据实际中的纤维化粉料中的不同成分或者成分相同但比例不同进行调整。通过该温度控制，使得第二轧辊40的温度不过于太低，而无法对膜片进行加热，进而导致膜片具有较大的摩擦力而便于延展；同时第二轧辊40的温度不过于太高而接触在膜片表面时，对膜片造成损坏。
进一步地，本实施例的两个第二轧辊40各自连接驱动机构，以能够通过各自的驱动机构进行驱动转动，以使各自具有不同的转速，以使两个第二轧辊40能够具有速度差，从而使由速度差对膜片产生一个牵引力，以驱使次始膜片往前运动；同时本实施例中的第二轧辊40连接各自的加热机构，以使两个第二轧辊40能够被加热到不同的温度，如此，能够通过加热机构对两个第二轧辊40加热时存在温度差，以实现膜片两侧具有不同的延展性。
进一步地，本实施例中的初次减薄过程中使用的部件还包括第一刮刀41和第一导辊42；通过第一刮刀41对向粘附于第二轧辊40表面的膜片施加下压力，以将膜片从第二轧辊40的表面进行分离；
通过第二轧辊40对初膜片300的厚度和压实度进行初调整，具体地，行走速度较快的粗调整；
如此，通过本步骤中对初膜片300进行初次减薄后，控制制备得到的次膜片的次厚度的厚度范围为0.1mm-0.3mm，以使次膜片具有一定的厚度，为后续膜片调整结构实现目标厚度的目标膜片500的压制做准备。
步骤S5，至少提供至少一对辊径为d3第三轧辊50，且d3＞d1，设定第三轧辊50的压力为t3，且t3＞t1，通过第三轧辊50对次膜片进行二次减薄，以得到目标厚度的目标膜片500。
完成上述步骤的预减薄之后，本步骤中对次膜片的厚度和压实度进行再次调整，具体地，相对初次调整，本步骤为对膜片进行精细调整。
具体地，本实施例中的第三轧辊50的辊径d3设置为d3＞d1＞d2，且第三轧辊50的压力t3设置为t3＞t1＞t2，即在粉料进行成膜和初次减薄后，在最终步骤的减薄成型时采用最大的辊径的轧辊和最大压力的轧辊，以实现对膜片的厚度和压实度的精调。
由于压辊在对膜片进行压制时，具有一个平行于膜片的延伸方向的第一分力和具有一个垂直于膜片的第二分力，通过设置辊径最大第三轧辊50，使得第三轧辊50的重量越大，同时配合第三轧辊50上施加的压力，能够向膜片施加的竖直方向上的分力越大，因此，本实施例在最终压制成型的步骤中通过采用最大的辊径，同时配合最大的压力，以对次膜片的厚度和压实度进行二次调整，以能够得到所需的目标厚度和压实度的终膜片。同时设置和第二轧辊40相差不大的速度，能够和第二压辊40的行走速度相适配，以适应于第二轧辊40输送而来的膜片的行走速度。
其中，第三轧辊50的辊径d3大范围设置为：15mm≤d3≤60mm，压力范围为：1吨≤t3≤10吨，从而实现第三轧辊50的辊径相对第一轧辊20和第二轧辊40能够具有更大的辊径和压力，以能够实现对膜片厚度和压实度调整为目标参数的效果。
进一步地，本实施例中的第三轧辊50的速度V3范围设置为：V2≥V3＞V1，具体地，500rpm≤V3≤2000rpm；本实施例的第三轧辊50的温度设置为最小，T1≥T2＞T3，具体地，0℃≤T3≤150℃，以使第三轧辊50能够具有较小的速度和温度，对膜片进行精细的调整。
可以理解地，在通过第三轧辊50进行压制时，还设有第二刮刀51，通过第二刮刀51对向粘附于第三轧辊50表面的膜片施加下压力，以将膜片从第三轧辊50的表面进行分离。
具体地，本实施例中所得到的终膜片的厚范围为0.06mm -0.2mm。
具体地，本实施例中的第一轧辊20的辊径d1可以设置为10cm、12cm、15cm、17cm、20cm、30cm等数值；第二轧辊40的辊径d2可以设置为：5cm、6cm、7cm、10cm、15cm、20cm等数值，第三轧辊50的辊径d3可以设置为15cm、30cm、45cm、50cm、55cm、60cm等数值；第一轧辊20的压力t1可以设置为0.8吨、1吨、2吨、3吨、5吨、8吨等数值；第二轧辊40的压力t2可以设置为0.5吨、1吨、2吨、4吨、6吨、7吨等数值；第三轧辊50的压力t3可以设置为1吨、2吨、4吨、6吨、8吨、10吨等数值。
进一步地，本实施例中的两个第三轧辊50之间间隙大小可调，两者之间的精度公差为±1μm，以能够精细的调整最终所得到的目标膜片500的厚度的大小。
可以理解地，完成上述干法极片膜片的制备之后，本实施例的干法极片膜片的制备方法还包括收卷步骤，通过收卷结构对终膜片进行收卷，以用于下一步骤中的制备极片使用。
根据本实施例中的干法极片膜片的制备方法所得到的膜片的测试数据如图2所示，其中，曲线a为现有市场上的常规工艺所制备得到的膜片的拉伸强度的示意图，曲线b为采用第一轧辊20所得到的初膜片的拉伸强度的示意图，曲线c为采用第二轧辊40对初膜片初步减薄后所得到的次膜片的拉伸强度的示意图，曲线d为采用第三轧辊50对次膜片进行二次减薄后所得到的目标膜片的拉伸强度的示意图。
具体地，由图2可以看出：采用普通干法工艺经一次成膜制备的厚膜片进行减薄至目标面密度和厚度，其强度和韧性较差，拉伸强度为0.62MPa, 断裂伸长率10.48%。
通过第一轧辊20所得到的初膜片，测试得到拉伸强度为1.15MPa, 断裂伸长率9.86%。表明通过第一轧辊20所制备的初膜片强韧性优于普通工艺。
通过第二轧辊40所得到的次膜片，对初膜片经减薄后，测试得到拉伸强度为1.39MPa, 断裂伸长率8.59%。由此可得出，通过第二轧辊40减薄后所得到的次膜片的强韧性优于普通工艺和第一轧辊20所得到的初膜片，表明减薄轧辊的参数控制能有效提升膜片性能。
通过第三轧辊50所得到的目标膜片，经对初膜片进行了二次减薄，测试目标膜片，得到拉伸强度为1.53MPa, 断裂伸长率8.24%。通过以上数据表明，经过本实施例中的第二轧辊40和第三轧辊50经参数控制以初膜片进行二次减薄后得到的目标膜片的强韧性得到提升，使得最终制备得到的膜片的性能得到有效提升。
上述干法极片膜片的制备方法，通过将粉料压合成膜的第一轧辊20以及对膜片厚度和压实度进行一次、二次调整的第二轧辊40和第三轧辊50的辊径和压力设置为d3＞d1＞d2，t3＞t1＞t2的方式，以在对粉料进行压制成膜和调整时，能够首先通过较大辊径和压力的第一轧辊20对粉料进行压制初成膜，再通过较小辊径和压力的第二轧辊40以较快的行走速度对初膜片300进行快速的粗调，使得膜片的厚度和压实度进行得到初步调整，最后通过最大辊径和最大压力的第三轧辊50对膜片进行大压力的精细调整，以使得到的膜片能够符合所需的厚度，具有更高的压实度，同时使膜片具有更高的强度和更高的韧性等机械性能，同时使膜片具有优异的孔道结构，以提升膜片应用于电池时的电池电性能，同时具有更低的曲折度。
请参阅图3，本申请在第二实施例中还提供一种干法极片膜片的制备设备200，包括一对第一轧辊20、一对第二轧辊40以及至少一对第三轧辊50。
其中，一对第一轧辊20用于对纤维化粉料进行辊压，以得到初厚度的初膜片300，第一压辊的直径为d1，第一轧辊20的压力为t1；一对第二轧辊40，设于一对第一轧辊20的下游，用于对初膜片300进行减薄，以得到次厚度的次膜片, 第二压辊的直径为d2，第二轧辊40的压力为t2；至少一对第三轧辊50，设于第二轧辊40的下游，用于对次膜片进行二次减薄，以得到终厚度的终膜片，第三轧辊50的直径为d3，第二轧辊40的压力为t3，其中，d3＞d1＞d2，t3＞t1＞t2。
上述干法极片膜片的制备设备200，通过将粉料压合成膜的第一轧辊20以及对膜片厚度和压实度进行一次、二次调整的第二轧辊40和第三轧辊50的辊径和压力设置为d3＞d1＞d2，t3＞t1＞t2的方式，以在对粉料进行压制成膜和调整时，能够首先通过较大辊径和压力的第一轧辊20对粉料进行压制初成膜，再通过较小辊径和压力的第二轧辊40以较快的行走速度对初膜片300进行快速的粗调，使得膜片的厚度和压实度进行得到初步调整，最后通过最大辊径和最大压力的第三轧辊50对膜片进行大压力的精细调整，以使得到的膜片能够符合所需的厚度，具有更高的压实度，同时使膜片具有更高的强度和更高的韧性等机械性能，同时使膜片具有优异的孔道结构，以提升膜片应用于电池时的电池电性能，同时具有更低的曲折度。
进一步地，本实施例的制备设备还包括下料结构10，用于向一对第一轧辊20进行送料，下料结构10包括震动筛网11和设于震动筛网11下方的活动料槽12，震动筛网11包括两层从上往下分隔设置的筛网，活动料槽12用于接收震动筛网11掉落的粉料以送出，如此，当粉料倒在震动筛网11上之后，震动筛网11进行震动，以将粉料经过两层筛网逐渐掉落在活动料槽12上，活动料槽12能够由竖直状态逐渐往水平状态调整，以带动粉料移动，以将粉料逐渐洒落，同时调整粉料洒落的速度，避免发生粉料的堆积或结块。
可以理解地，本实施中还包括第二导辊60，以将初膜片300能够得到换向，导向第二轧辊40处。
其中，本实施例中采用震动筛网11的方式能够实现对纤维化粉体的造粒，同时能够通过不同孔径的筛网得到不同粒径的粉体，控制不同的成膜效率，同时能够达到防止纤维化粉料结块的效果，以保证下料的均匀性和持续性。
此外，为了保证生产得到的终膜片的边缘的平整度，干法极片膜片的制备设备还包括切割结构30，切割结构30用于对初膜片300的边缘进行切割，包括支撑辊31、切边刀32、吸粉嘴33和除尘盒34，支撑辊31用于对初膜片300进行支撑，切边刀32用于对初膜片300的边缘进行切割，吸粉嘴33用于吸走切边刀32切割过程中产生的碎屑和粉尘，除尘盒34用于收集吸粉嘴33吸附而来的碎屑和粉尘，通过设置切边刀32的方式，本步骤中通过切边刀32能够对初膜片300的平整度进行调整，同时通过吸粉嘴33的吸附和除尘盒34的收集，避免粉体和碎屑飞落在环境中。

Claims (11)

  1. 干法极片膜片的制备方法，包括：
    提供一对辊径为d1的第一轧辊，设定所述第一轧辊的压力为t1，通过一对第一轧辊对纤维化粉料进行辊压，以得到初厚度的初膜片；
    提供一对辊径为d2第二轧辊，且d2＜d1，设定所述第二轧辊的压力为t2，且t2＜t1，通过一对第二轧辊对所述初膜片进行初次减薄，以得到次厚度的次膜片；
    至少提供一对辊径为d3第三轧辊，且d3＞d1，设定所述第三轧辊的压力为t3，且t3＞t1，通过所述第三轧辊对所述次膜片进行二次减薄，以得到目标厚度的目标膜片。
  2. 根据权利要求1所述的干法极片膜片的制备方法，其中，10cm≤d1≤30cm；5cm≤d2≤20cm；15cm≤d3≤60cm。
  3. 根据权利要求1或2所述的干法极片膜片的制备方法，其中，所述第一轧辊的转速为V1，所述第二轧辊的转速为V2，所述第三轧辊的转速为V3，其中，V2≥V3＞V1。
  4. 根据权利要求3所述的干法极片膜片的制备方法，其中，
    0rpm＜V1≤1800rpm；
    500rpm≤V2≤2000rpm；
    500rpm≤V3≤2000rpm。
  5. 根据权利要求1或2所述的干法极片膜片的制备方法，其中，0.8吨≤t1≤8吨, 0.5吨≤t2≤7吨, 1吨≤t3≤10吨。
  6. 根据权利要求1或2所述的干法极片膜片的制备方法，其中，所述第一轧辊的温度为T1，所述第二轧辊的温度为T2，所述第三轧辊的温度为T3；
    其中，T1≥T2＞T3。
  7. 根据权利要求6所述的干法极片膜片的制备方法，其中，50℃≤T1≤200℃，50℃≤T2≤200℃，0℃≤T3≤150℃。
  8. 根据权利要求1或2所述的干法极片膜片的制备方法，其中，
    所述初膜片的厚度范围为0.2mm-1.0mm；
    所述次膜片的厚度范围为0.1mm-0.3mm；
    所述终膜片的厚度范围为0.06mm-0.2mm。
  9. 干法极片膜片的制备设备，包括：
    一对第一轧辊，设于所述下料结构的下游，用于对纤维化粉料进行辊压，以得到初厚度的初膜片，所述第一压辊的直径为d1，所述第一轧辊的压力为t1；
    一对第二轧辊，设于一对所述第一轧辊的下游，用于对所述初膜片进行初次减薄，以得到次厚度的次膜片, 所述第二压辊的直径为d2，所述第二轧辊的压力为t2；
    至少一对第三轧辊，设于一对所述第二轧辊的下游，用于对所述次膜片进行二次减薄，以得到目标厚度的目标膜片，所述第三压辊的直径为d3，所述第二轧辊的压力为t3，
    其中，d3＞d1＞d2，t3＞t1＞t2。
  10. 根据权利要求9所述的干法极片膜片的制备设备，所述干法极片膜片的制备设备还包括切割结构，所述切割结构用于对初膜片的边缘进行切割，所述切割结构包括支撑辊、切边刀、吸粉嘴和除尘盒，所述支撑辊用于对所述初膜片进行支撑，所述切边刀用于对所述初膜片的边缘进行切割，所述吸粉嘴用于吸走所述切边刀切割过程中产生的碎屑和粉尘，所述除尘盒用于收集所述吸粉嘴吸附而来的碎屑和粉尘。
  11. 根据权利要求9所述的干法极片膜片的制备设备，其中，所述干法极片膜片的制备设备还包括下料结构，用于向一对所述第一轧辊进行送料，所述下料结构包括震动筛网和设于所述震动筛网下方的活动料槽，所述活动料槽用于接收所述震动筛网掉落的粉料并送出。
PCT/CN2024/079648 2024-01-15 2024-03-01 干法极片膜片的制备方法和制备设备 Pending WO2025152242A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP24205891.5A EP4586331A1 (en) 2024-01-15 2024-10-10 Method for preparing dry electrode sheet film and preparation apparatus thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202410058114.5A CN118024655B (zh) 2024-01-15 2024-01-15 干法极片膜片的制备方法和制备设备
CN202410058114.5 2024-01-15

Publications (1)

Publication Number Publication Date
WO2025152242A1 true WO2025152242A1 (zh) 2025-07-24

Family

ID=90992114

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2024/079648 Pending WO2025152242A1 (zh) 2024-01-15 2024-03-01 干法极片膜片的制备方法和制备设备

Country Status (2)

Country Link
CN (1) CN118024655B (zh)
WO (1) WO2025152242A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118867108A (zh) * 2024-08-30 2024-10-29 广汽埃安新能源汽车股份有限公司 一种干法极片膜的制备方法
CN119773291B (zh) * 2024-12-31 2025-10-14 深圳市赢合科技股份有限公司 一种电极干法辊压设备及其锂电池生产方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011181348A (ja) * 2010-03-01 2011-09-15 Hitachi Engineering & Services Co Ltd 二次電池用電極材のロールプレス機
CN112542563A (zh) * 2020-12-02 2021-03-23 湖北亿纬动力有限公司 一种极片及其制备方法、锂离子电池和制备装置
CN115101721A (zh) * 2022-07-29 2022-09-23 广东利元亨智能装备股份有限公司 一种电极膜成型方法及装置和极片制造方法及装置
CN116031360A (zh) * 2022-12-30 2023-04-28 湖北亿纬动力有限公司 干法电池材料的混料方法及干电极膜片制备方法
CN219677279U (zh) * 2023-02-28 2023-09-12 蜂巢能源科技股份有限公司 极片制备装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109256522B (zh) * 2017-07-12 2024-07-12 宁德时代新能源科技股份有限公司 压延机构及极片补锂装置
CN115621408A (zh) * 2022-10-17 2023-01-17 上海先导慧能技术有限公司 一种干电极制备设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011181348A (ja) * 2010-03-01 2011-09-15 Hitachi Engineering & Services Co Ltd 二次電池用電極材のロールプレス機
CN112542563A (zh) * 2020-12-02 2021-03-23 湖北亿纬动力有限公司 一种极片及其制备方法、锂离子电池和制备装置
CN115101721A (zh) * 2022-07-29 2022-09-23 广东利元亨智能装备股份有限公司 一种电极膜成型方法及装置和极片制造方法及装置
CN116031360A (zh) * 2022-12-30 2023-04-28 湖北亿纬动力有限公司 干法电池材料的混料方法及干电极膜片制备方法
CN219677279U (zh) * 2023-02-28 2023-09-12 蜂巢能源科技股份有限公司 极片制备装置

Also Published As

Publication number Publication date
CN118024655A (zh) 2024-05-14
CN118024655B (zh) 2025-03-18

Similar Documents

Publication Publication Date Title
KR102696472B1 (ko) 이차전지용 건식 전극을 제조하기 위한 전극용 분체, 이의 제조방법, 이를 사용한 건식 전극의 제조방법, 건식 전극, 이를 포함하는 이차전지, 에너지 저장장치, 및 건식 전극 제조장치
KR102918103B1 (ko) 건식 전극 필름을 포함하는 전기화학소자용 전극 및 이의 제조 방법
CN118024655B (zh) 干法极片膜片的制备方法和制备设备
CN112542563B (zh) 一种极片及其制备方法、锂离子电池和制备装置
CN114628634B (zh) 一种正极片、制备方法及全固态电池
CN113871561B (zh) 干法电极极片的制备方法及电极极片和电芯
KR20230025359A (ko) 건식 전극 필름을 포함하는 전기화학소자용 전극 및 이의 제조 방법
KR20230022129A (ko) 건식 전극 필름을 포함하는 전기화학소자용 전극 및 이의 제조 방법
JP2015041601A (ja) リチウムイオン二次電池用多孔膜組成物、リチウムイオン二次電池用保護層付きセパレータ、リチウムイオン二次電池用保護層付き電極、およびリチウムイオン二次電池
US20250105244A1 (en) Method Of Manufacturing An Electrode Comprising A Dry Electrode Film And An Electrode For An Electrochemical Device Therefrom
KR102838158B1 (ko) 전극용 필름, 이를 포함하는 전극, 이차전지, 및 이의 제조 방법
JP2025505534A (ja) 電極組立体、及びこれを含む二次電池
CN115207272A (zh) 电极、包括所述电极的二次电池以及制造所述电极的方法
CN112038575B (zh) 一种锂带及其制备方法和用途
JP4166973B2 (ja) 電池用電極製造用プレス装置及び電池用電極の製造方法
CN113517420B (zh) 一种电池极片的制作方法及电池极片
EP4586331A1 (en) Method for preparing dry electrode sheet film and preparation apparatus thereof
CN119029147A (zh) 电极极片及其制备方法
CN118969947A (zh) 一种负极片及其制备方法
CN117174835A (zh) 干法电极制备方法、制备系统及干电极
WO2025152250A1 (zh) 膜片制备设备及制备方法
JP2024533404A (ja) 電極、これを含む二次電池、及びこの製造方法
KR102965697B1 (ko) 이차 전지용 전극 제조장치
US20260112607A1 (en) Electrode for Electrochemical Device
CN120824436B (zh) 一种固态电池材料及其振动场压合生产线

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24917860

Country of ref document: EP

Kind code of ref document: A1